Hi Andrea and Sigrid:
Some of the Drupal Website team members will be taking a closer look into the IA and hopefully we will have a site for you to test try and give comments on what features that you would like to add.
IMHO, it would be great if a documentation member were to join the Drupal team for direct input. We are just at the very start stages of organising and will have some ideas coming through soon.
BTW ... Michael Wheatland has just left a note on the website mailist re: and IA outline that had been proposed by Benjamin Horst a while ago. You could also comment on this as well.
Marc